S-90128A580 5/16"-18 x 5/8" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure.
• Zinc-plated alloy steel construction provides superior corrosion resistance, extending service life in demanding industrial environments.
• Class 3A thread fit offers precise, tight tolerances for secure fastening and vibration resistance in critical assemblies.
• Hex socket drive design allows for easy installation and removal with standard tools, minimizing assembly time and effort.
• Fully threaded body ensures consistent engagement along the entire length, providing uniform clamping force and stability.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees adherence to industry standards and environmental regulations for safe, reliable use.
• Coarse UNC thread pattern enables quick assembly and disassembly, ideal for applications requiring frequent maintenance or adjustments.

Professional Applications & Engineering Value

This 5/16"-18 UNC socket head cap screw is engineered to address common industrial challenges such as vibration loosening and material fatigue. The zinc-plated alloy steel material, combined with a Rockwell C37 hardness, provides excellent durability and resistance to wear in high-load environments like machinery, automotive systems, and heavy equipment. The fully threaded design and coarse thread ensure rapid installation and reliable holding power, reducing downtime in assembly lines. Its hex drive allows for compact spaces and torque control, making it ideal for precision engineering applications where space and reliability are critical. By meeting ASTM A574 specifications, it delivers consistent performance for B2B users seeking dependable industrial fastening solutions.

Specification Summary & Compliance

This product features a Class 3A thread fit for precise dimensional accuracy under UNC standards, with a thread size of 5/16"-18 and coarse spacing. It complies with ASTM A574 manufacturing specifications for high-strength socket head cap screws, ensuring uniformity and reliability. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for restricted substances.